11.18 On Board Maintenance Flashcards
What is the purpose of an OBMS (On Board Maintenance System)?
monitor & test aircraft systems, record & store information & provide information about faults
What is the purpose of a CMS (Central Maintenance System)?
monitor the fault status of aircraft systems
What does a CMS consist of?
1 or 2 CMCs & 2 or 3 MCDUs
Where are the CMCs (Central Maintenance Computers) located?
avionics bay
Where are the MCDUs (Multi Control Display Units) located?
flight deck
What are the levels of alerts on a Boeing aircraft & what do they mean?
Level A - warning, Level B - caution, Level C - advisory
What are the classes of alerts on a Airbus aircraft & what do they mean?
Class 1 - warning/caution, Class 2 - advisory/ system status, Class 3 - fault (visible to engineer only)
What is a Data Loading System & what is its function?
interface between aircraft computers & ground data processing equipment - used to update software & databases
Who can use the Data Loading System?
approved engineer
What are the 4 ways data can be brought to aircraft through?
disc, pen drive, airport network & maintenance laptop
What are the 2 disc drive unit modes & what do they do?
Automatic - view & download data, manual - download data
What is the function of the ELS (Electronic Library System)?
provides all manuals/ information that flight crew & maintenance personnel require
What are the 3 types of SHM (Structure Health Monitoring)?
fatigue meters, strain gauges & intelligent skins?
What material do intelligent skins monitor & using what?
composite skins - light sensitive
What do strain gauges monitor?
Lateral deformation
